Weight combining and subchannel allocation to reduce self interference in OFDMA-CDM system

Norikazu Matsui, Keisuke Mutou, Satoru Iijima, Iwao Sasase

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

We propose a subchannel allocation by considering multiuser diversity to reduce Self Interference (SI) which arises due to the destrunction of orthogonality of spreading codes in Orthogonal Frequency Division Multiple Access - Code Division Multiplexing (OFDMA-CDM) system. The conventional OFDMA-CDM does not effectively reduce SI, since it does not consider multiuser diversity. The proposed scheme allocates subchannels to the user who has largest minimum Carrier to Interference Ratio (CIR) since the conventional weight combining is done by minimum channel gain. By doing the proposed subchannel allocation, minimum CIR becomes high and each user can use good subchannels. Due to the effective multiuser diversity, demodulated symbols can be weighted by high channel gain. Since the proposed scheme can generate reliable demodulated symbols, the proposed scheme can reduce SI. The simulation results show that the proposed scheme can improve the BER performance.

本文言語English
ホスト出版物のタイトルPACRIM 2009 - 2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing
ページ262-267
ページ数6
DOI
出版ステータスPublished - 2009
イベントPACRIM 2009 - 2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing - Victoria, BC, Canada
継続期間: 2009 8 232009 8 26

出版物シリーズ

名前IEEE Pacific RIM Conference on Communications, Computers, and Signal Processing - Proceedings

Other

OtherPACRIM 2009 - 2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing
国/地域Canada
CityVictoria, BC
Period09/8/2309/8/26

ASJC Scopus subject areas

  • 信号処理
  • コンピュータ ネットワークおよび通信

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